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二点五乘零点七乘零点四的简便方法运算

2.5*0.7*0.4=2.5*0.4*0.7=1*0.7=0.7

2.5x0.8一1.8x0.5简便运算 =0.5x5x0.8一1.8x0.5 =0.5x(5x0.8一1.8) =0.5x(4一1.8) =0.5x2.2 =1.1

2.5X0.974X0.4=2.5X0.4x0.974=1X0.974=0.974

0.3*2.5*0.4 =0.3*1=0.31.5*105=3*105/2=315/2=157.5

解:原式=0.3*(2.5*0.4)=0.3*1=0.3

64乘以十二点五乘以零点二五乘以零点零五=8*12.5*4*0.25*2*0.05=100*1*0.1=10

2.7*0.45+0.27*4.2+2.7*0.13=2.7*0.45+2.7*0.42+2.7*0.13=2.7(0.45+0.42+0.13)=2.7*1=2.7

用简便方法计算0.251点七乘零点四0.25*1.7*0.4=1.7*(0.25*0.4)=1.7*0.1=0.17

您好:0.94x2.5+0.094x75=0.94x2.5+0.94x7.5=0.94x(2.5+7.5)=0.94x10=9.4如果本题有什么不明白可以追问,如果满意请点击右下角“采纳为满意回答”如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢.祝学习进步!

原式=2.5x0.48=2.5x(4x0.12)=2.5x4x0.12=10x0.12=1.2或者=2.5x(0.4x1.2)=2.5x0.4x1.2=1x1.2=1.2

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